Sink



FIG. 1 is a perspective view of the sink showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof, the opposite view beingidentical; and,

FIG. 5 is a rear elevational view thereof.

The dashed lines in the drawings are shown for environmental purposesand form no part of the claimed design.

The ornamental design for a “sink”, as shown and described.